<template>
  <div class="player"
       v-show="playlist.length>0">
    <transition name='normal'>
      <div class="normal-player"
           v-show="fullScreen">
        <div class="background">
          <img width="100%"
               height="100%"
               :src="currentSong.image">
        </div>
        <div class="top">
          <div class="back"
               @click="back">
            <i class="icon-back"></i>
          </div>
          <h1 class="title">{{currentSong.name}}</h1>
          <h2 class="subtitle">{{currentSong.singer}}</h2>
        </div>
        <div class="middle">
          <div class="middle-l"
               ref="middleL">
            <div class="cd-wrapper"
                 ref="cdWrapper">
              <div class="cd"
                   :class="cdCls">
                <img class="image"
                     :src='currentSong.image'>
              </div>
            </div>
            <div class="playing-lyric-wrapper">
              <div class="playing-lyric"></div>
            </div>
          </div>
          <scroll class="middle-r"
                  ref="lyricList">
            <div class="lyric-wrapper">
              <div v-if="currentLyric">
                <p ref="lyricLine"
                   class="text"
                   :class="{'current':currentLineNum==index}"
                   v-for="(line, index) in currentLyric.lines"
                   :key="index">{{line.txt}}--{{index}}--{{line.time}}</p>
              </div>
            </div>
          </scroll>
        </div>
        <div class="bottom">
          <div class="progress-wrapper">
            <span class="time time-l">{{format(currentTime)}}</span>
            <div class="progress-bar-wrapper">
              <progress-bar :percent="percent"
                            @percentChange="onPercentChange"></progress-bar>
            </div>
            <span class="time time-r">{{QQformat(currentSong.duration)}}</span>
          </div>
          <div class="operators">
            <div class="icon i-left">
              <i :class="iconMode"
                 @click="changeMode"></i>
            </div>
            <div class="icon i-left">
              <i @click="prev"
                 class="icon-prev"></i>
            </div>
            <div class="icon i-center">
              <i @click="togglePlaying"
                 :class="playIcon"></i>
            </div>
            <div class="icon i-right">
              <i @click="next"
                 class="icon-next"></i>
            </div>
            <div class="icon i-right">
              <i class="icon icon-not-favorite"></i>
            </div>
          </div>
        </div>
      </div>
    </transition>
    <transition name='mini'>
      <div class="mini-player"
           v-show="!fullScreen"
           @click="open()">
        <div class="icon">
          <img :class="cdCls"
               width="40"
               height="40"
               :src='currentSong.image'>
        </div>
        <div class="text">
          <h2 class="name">{{currentSong.name}}</h2>
          <p class="desc">{{currentSong.singer}}</p>
        </div>
        <div class="control">
          <progressCircle :radius='32'
                          :percent="percent">
            <i @click.stop="togglePlaying"
               class="icon-mini"
               :class="iconMini">
            </i>
          </progressCircle>
        </div>
        <div class="control">
          <i class="icon-playlist"></i>
        </div>
      </div>
    </transition>
    <audio ref="audio"
           :src="currentSong.url"
           @timeupdate="updateTime"
           @error="error"
           @canplay="ready"></audio>
  </div>
</template>

<script type="text/ecmascript-6">
import { mapGetters, mapMutations, mapActions } from 'vuex'
import progressBar from 'base/progress-bar/progress-bar'
import progressCircle from 'base/progress-circle/progress-circle'
import Scroll from 'base/scroll/scroll'
import { playMode } from 'common/js/config'
import lyric from 'lyric-parser'


export default {
  data () {
    return {
      // ready才可以点下一首
      songReady: false,
      currentTime: '0',
      currentLyric: null,
      currentLineNum: 0,
    }
  },
  computed: {
    // 播放时长
    // 播放百分比
    percent () {
      return this.currentTime * 1000 / this.currentSong.duration
    },
    cdCls () {
      return this.playing ? 'play' : 'play pause'
    },
    playIcon () {
      return this.playing ? 'icon-pause' : 'icon-play'
    },
    iconMini () {
      return this.playing ? 'icon-pause-mini' : 'icon-play-mini'
    },
    iconMode () {
      return this.mode === playMode.sequence ? 'icon-sequence' : this.mode == playMode.loop ? 'icon-loop' : 'icon-random'
    },
    ...mapGetters([
      'playlist',
      'fullScreen',
      'currentSong',
      'playing',
      'currentIndex',
      'mode'
    ])
  },
  methods: {
    ...mapActions([
      'selectPlay'
    ]),
    ...mapMutations({
      setFullScreen: 'SET_FULL_SCREEN',
      setPalyingState: 'SET_PALYING_STATE',
      setCurrentIndex: 'SET_CURRENT_INDEX',
      setPlayMode: 'SET_PLAY_MODE',
    }),
    onPercentChange (percent) {
      console.log('percent', percent);
      console.log(this.currentSong.duration);
      this.$refs.audio.currentTime = (this.currentSong.duration * percent) / 1000
      if (!this.playing) {
        this.togglePlaying()
      }
    },
    // 播放时长
    updateTime (e) {
      this.currentTime = e.target.currentTime
    },
    ready () {
      this.songReady = true
    },
    error () { },
    // 改变播放模式
    changeMode () {
      const mode = (this.mode + 1) % 3
      this.setPlayMode(mode)
    },
    prev () {
      // 没ready不给点
      if (!this.songReady) {
        return
      }
      let index = this.currentIndex - 1
      if (index == -1) {
        index = this.playlist.length - 1
      }
      this.setCurrentIndex(index)
      if (!this.playing) {
        this.togglePlaying()
      }
      this.songReady = false

    },
    // 获取歌词
    getLyric () {
      return new Promise((resolve, rej) => {
        this.$api.music.getMusicLyric(this.currentSong.id).then(res => {
          resolve(res.lrc.lyric)

        })
      })
    },


    // 下一曲
    next () {
      if (!this.songReady) {
        return
      }
      let index = this.currentIndex + 1
      if (index == this.playlist.length) {
        index = 0
      }
      this.setCurrentIndex(index)
      if (!this.playing) {
        this.togglePlaying()
      }
      this.songReady = false
    },
    back () {
      this.setFullScreen(false)
    },
    open () {
      this.setFullScreen(true)
    },

    // 格式化时间
    format (interval) {
      interval = interval | 0
      const minute = interval / 60 | 0
      const second = this._pad(interval % 60)
      return `${minute}:${second}`
    },
    QQformat (interval) {
      interval = interval | 0
      let intervalSec = interval / 1000 | 0
      const minute = intervalSec / 60 | 0
      const second = this._pad(intervalSec % 60)
      return `${minute}:${second}`
    },
    _pad (num, n = 2) {
      let len = num.toString().length
      while (len < n) {
        num = '0' + num
        len++
      }
      return num
    },
    enter (el, done) {

    },
    afterEnter () { },
    leave (el, done) { },
    afterLeave () { },
    togglePlaying () {
      this.setPalyingState(!this.playing)
    }
  },
  watch: {
    // 播放结束下一曲
    currentTime (newVal) {
      if (newVal * 1000 >= this.currentSong.duration) {
        this.next()
      }
    },
    currentSong () {
      console.log('bmbm');

      this.$nextTick(() => {
        this.$refs.audio.play()
        this.getLyric().then(res => {
          this.currentLyric = new lyric(res, this.handleLyric)

          if (this.playing) {
            this.currentLyric.play()
          }
        })
      })
    },
    playing (newPalying) {
      const audio = this.$refs.audio
      this.$nextTick(() => {
        newPalying ? audio.play() : audio.pause()
      })
    }
  },
  components: {
    progressBar,
    progressCircle,
    Scroll
  }
}
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
@import '~common/stylus/variable'
@import '~common/stylus/mixin'
.player
  .normal-player
    position fixed
    left 0
    right 0
    top 0
    bottom 0
    z-index 150
    background $color-background
    .background
      position absolute
      left 0
      top 0
      width 100%
      height 100%
      z-index -1
      opacity 0.6
      filter blur(20px)
    .top
      position relative
      margin-bottom 25px
      .back
        position absolute
        top 0
        left 6px
        z-index 50
        .icon-back
          display block
          padding 9px
          font-size $font-size-large-x
          color $color-theme
          transform rotate(-90deg)
      .title
        width 70%
        margin 0 auto
        line-height 40px
        text-align center
        no-wrap()
        font-size $font-size-large
        color $color-text
      .subtitle
        line-height 20px
        text-align center
        font-size $font-size-medium
        color $color-text
    .middle
      position fixed
      width 100%
      top 80px
      bottom 170px
      white-space nowrap
      font-size 0
      .middle-l
        display inline-block
        vertical-align top
        position relative
        width 100%
        height 0
        padding-top 80%
        .cd-wrapper
          position absolute
          left 10%
          top 0
          width 80%
          height 100%
          .cd
            width 100%
            height 100%
            box-sizing border-box
            border 10px solid rgba(255, 255, 255, 0.1)
            border-radius 50%
            &.play
              animation rotate 20s linear infinite
            &.pause
              animation-play-state paused
            .image
              position absolute
              left 0
              top 0
              width 100%
              height 100%
              border-radius 50%
        .playing-lyric-wrapper
          width 80%
          margin 30px auto 0 auto
          overflow hidden
          text-align center
          .playing-lyric
            height 20px
            line-height 20px
            font-size $font-size-medium
            color $color-text-l
      .middle-r
        display inline-block
        vertical-align top
        width 100%
        height 100%
        overflow hidden
        .lyric-wrapper
          width 80%
          margin 0 auto
          overflow hidden
          text-align center
          .text
            line-height 32px
            color $color-text-l
            font-size $font-size-medium
            &.current
              color $color-text
    .bottom
      position absolute
      bottom 50px
      width 100%
      .dot-wrapper
        text-align center
        font-size 0
        .dot
          display inline-block
          vertical-align middle
          margin 0 4px
          width 8px
          height 8px
          border-radius 50%
          background $color-text-l
          &.active
            width 20px
            border-radius 5px
            background $color-text-ll
      .progress-wrapper
        display flex
        align-items center
        width 80%
        margin 0px auto
        padding 10px 0
        .time
          color $color-text
          font-size $font-size-small
          flex 0 0 30px
          line-height 30px
          width 30px
          &.time-l
            text-align left
          &.time-r
            text-align right
        .progress-bar-wrapper
          flex 1
      .operators
        display flex
        align-items center
        .icon
          flex 1
          color $color-theme
          &.disable
            color $color-theme-d
          i
            font-size 30px
        .i-left
          text-align right
        .i-center
          padding 0 20px
          text-align center
          i
            font-size 40px
        .i-right
          text-align left
        .icon-favorite
          color $color-sub-theme
    &.normal-enter-active, &.normal-leave-active
      transition all 0.4s
      .top, .bottom
        transition all 0.4s cubic-bezier(0.86, 0.18, 0.82, 1.32)
    &.normal-enter, &.normal-leave-to
      opacity 0
      .top
        transform translate3d(0, -100px, 0)
      .bottom
        transform translate3d(0, 100px, 0)
  .mini-player
    display flex
    align-items center
    position fixed
    left 0
    bottom 0
    z-index 180
    width 100%
    height 60px
    background $color-highlight-background
    &.mini-enter-active, &.mini-leave-active
      transition all 0.4s
    &.mini-enter, &.mini-leave-to
      opacity 0
    .icon
      flex 0 0 40px
      width 40px
      padding 0 10px 0 20px
      img
        border-radius 50%
        &.play
          animation rotate 10s linear infinite
        &.pause
          animation-play-state paused
    .text
      display flex
      flex-direction column
      justify-content center
      flex 1
      line-height 20px
      overflow hidden
      .name
        margin-bottom 2px
        no-wrap()
        font-size $font-size-medium
        color $color-text
      .desc
        no-wrap()
        font-size $font-size-small
        color $color-text-d
    .control
      flex 0 0 30px
      width 30px
      padding 0 10px
      .icon-play-mini, .icon-pause-mini, .icon-playlist
        font-size 30px
        color $color-theme-d
      .icon-mini
        font-size 32px
        position absolute
        left 0
        top 0
@keyframes rotate
  0%
    transform rotate(0)
  100%
    transform rotate(360deg)
</style>